Brushless Motor: Purposely built for the M18 FUEL to provide the power and performance of a 15A corded reciprocating saw. Intelligence: Ensures optimal performance and provides overload protection to prevent damage to the tool and battery during heavy applications while still maintaining compatibility across the entire M18 System. HIGH OUTPUT HD12.0 Battery Pack: Provides 50% more power and runs 50% cooler versus standard HD packs. Superior pack construction provides the industry's best protection against jobsite conditions. 1-1/4" Stroke length removes more material with each stroke Variable speed trigger and 5-speed dial provide ultimate speed control Integrated rafter hook for easy storage between cuts LED light for increased accuracy and visibility Adjustable shoe extends the life of the blade Blade Clamp for toolless blade changes Compatible with all M18 Batteries - NOT INCLUDED